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Hi Kerstin, we don't know how the binning was varied in BAD540 for systematic studies. In our 2D fits, we are using 4x4 bins in (mx,q2) such that the first mx bin goes from 0 to the mx cut, and the last q2 bin goes from the q2 cut to 26. We have investigated some different possibilities for the q2 binning. Our default is to divide the q2 range between 0 and the q2 cut in 3 equal-size bins, but this gives unstable results when the q2 cut is lower than, say, 5. We therefore used constant q2 bins evenly distributed (0,2,4,6,8,10,12,14,26), with more stable results at low q2 cuts. For higher q2 cuts, the two sets of q2 binnings give almost the same results. We also varied the mx binning with very small variations of the results. Cheers, Concezio and Virginia. Kerstin Tackmann wrote: >Hi all, > >we have a question concerning the uncertainty from binning effects on the >mX spectrum fits. In BAD 540 you say that you varied the bin sizes in a >wide range and that you increased the number of bins. Is there some more >explixit information on the actual binnings you used for the estimation of >this uncertainty? >Virginia and Concezio, are you going to use the values as they were used >for BAD 540? > >Thanks, >Kerstin > >